Analytic geometry and principles of algebra (1913)
Ziwet, Alexander, 1853-1928, Hopkins, Louis Allen, joint author, Hedrick, E. R. (Earle Raymond), 1876-1943 · New York, The Macmillan Company · leaf 60
s calledthe principal diagonal ; that through ^3 the secondary diagonal.By § 41 we have ■ a, hi c, 1 hh -1 Co = a h Co + «2 ^3 C3 h Cz ^ Ci + «3 ho Co Thus, a determinant of the third order represents a sum of sixterms, each term heing a product ofthree elements and containing oneand only one… … 48 PLANE ANALYTIC GEOMETRY [III, § 42 Draw the principal diagonal and the parallels to it, as in thefigure; this gives the terms with sign -|-; then draw thesecondary diagonal and the parallels to it; this gives the termswith sign —. (Compare § 14.) 43. General Rule. When three linear equations,…
Geometry, Analytic
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